US 12,272,082 B2
Method and system for constructing bone model, medium and device
Mingjun Fu, Tianjin (CN); Wei Chai, Beijing (CN); Yuan Zhang, Chongqing (CN); Mingmin Ren, Tianjin (CN); Guoqing Yu, Tianjin (CN); Linshuai He, Tianjin (CN); Mingcheng Shen, Tianjin (CN); Zhongwei Wang, Tianjin (CN); and Chengcheng Shang, Tianjin (CN)
Assigned to Vostro Medical Technology (Tianjin) Co., Ltd, Tianjin Pilot Free Trade Zone (CN); Mingjun Fu, Henan Province (CN); and The Fourth Medical Center of PLA General Hospital, Beijing (CN)
Filed by Vostro Medical Technology (Tianjin) Co., Ltd, Tianjin Pilot Free Trade Zone (CN); Mingjun Fu, Henan Province (CN); and The Fourth Medical Center of PLA General Hospital, Beijing (CN)
Filed on Mar. 13, 2024, as Appl. No. 18/603,869.
Claims priority of application No. 202310705769.2 (CN), filed on Jun. 15, 2023.
Prior Publication US 2024/0420353 A1, Dec. 19, 2024
Int. Cl. G06T 15/00 (2011.01); G06T 7/33 (2017.01); G06T 17/00 (2006.01); G06T 19/20 (2011.01); G16H 50/50 (2018.01); A61B 34/10 (2016.01)
CPC G06T 7/344 (2017.01) [G06T 17/00 (2013.01); G06T 19/20 (2013.01); G16H 50/50 (2018.01); A61B 34/10 (2016.02); A61B 2034/105 (2016.02); G06T 2207/30008 (2013.01); G06T 2207/30204 (2013.01); G06T 2210/41 (2013.01); G06T 2219/2004 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for constructing a bone model, comprising the following steps:
acquiring a plurality of sample bone models, and marking sample feature points in the sample bone models;
selecting target feature points and target regional points on real bones of a patient, and recording positions of the target feature points and the target regional points under an image coordinate system, wherein the target feature points are points, corresponding to the sample feature points, on the real bones of the patient, and the target regional points are points in key regions needed for bone model construction;
performing a first spatial transformation on the target feature points and the target regional points under the image coordinate system according to the positions of the target feature points and the target regional points under the image coordinate system, so as to register the target feature points with the sample feature points in any sample bone model under the image coordinate system;
formulating an impact factor assignment strategy for assigning an impact factor for each sample bone model, and linearly combining all sample bone models according to the impact factor assignment strategy to construct an initial target bone model, and determining initial feature points corresponding to the target feature points in the initial target bone model;
adjusting the impact factor assignment strategy according to distances between the initial feature points and the corresponding target feature points, selecting an impact factor assignment strategy corresponding to a minimum distance between the initial feature points and the corresponding target feature points as an optimal impact factor assignment strategy, and determining an optimal initial target bone model according to the optimal impact factor assignment strategy; and
determining a matching point corresponding to each target regional point in the optimal initial target bone model, calculating a transformation relationship between the target regional point and the corresponding matching point, and performing a second spatial transformation on all points in the optimal initial target bone model according to the transformation relationship, so as to obtain a final target bone model.